TPO24 L4分析范例

TPO 24 Lecture4-Astronomy (Shield Volcanoes on Venus)

信号词弱读听到没理解连读听错生词句子结构没辨认出段意

Narrator: Listen to part of a lecture in an astronomy class.

Professor: Many people have been fascinated about Venus for centuries because of its thick cloud cover, this so-called planet of mystery and all of that. Well, what's under those clouds? What's the surface of the planet like? Some questions about the surface are still unresolved but, but we have learne d a lot about it in the past several years.

段意：主题段金星表面

First of all, let me talk about how we have been able to get past（听成pass）those clouds. First, there were Soviet modules that landed directly on the surface and sent back some images of what was around them. Second, we did some radar imaging from satellites from above. Radar can get through the clouds. So what have we learned? Yes, Karen?

段意：两个技术

Student: Well, I remember reading that there's not really a lot going on, that the surface of Venus is just flat and smooth in a lot of places.

Professor: Yeah, smooth in a lot of places.But that's not, um... that's not the whole picture. In other areas, you've got canyons, ripped valleys, meteor crater s, uh, lava domes, these lava formations that look like giant pancakes. And also volcanoes.

Well, one of the most interesting features on the surface are in fact the shield volcanoes. Shield volcanoes formed when magma comes out of the ground in the same spot over and over again. Remember, magma is hot molten rock that's underground, and it is called lava when it reaches the surface. Uh, so the lava builds up, and hardens, and a volcano forms.

Now, the lava on Venus is thin. It spreads out easily. So shield volcanoes have very gentle sloping sides.They are called shield volcanoes, because viewed from above, they kind of resemble shields, you know, like a warrior's shield.

段意：金星表面的盾状火山及名称由来

But what's particularly interesting about these volcanoes is that most of the volcanoes here on Earth are not shield volcanoes. Instead, they are other volcano types, like strata volcanoes, for example, which are a result of tectonic plate movement. Remember tectonic plates?

Underneath the Earth's crust, there are a number of shifting slab s or plates that are slowly moving. And in the zones on the edges of the plates where different plates meet and interact, that's where we get most of Earth's volcanoes.

On Venus, however,volcanoes are not clustered in discrete zones like they are on Earth. Instead, they are more or less randomly scattered over Venus's surface. Well, that's significant. Venus has mostly shield volcanoes, and they are randomly scattered, that indicates that Venus does not have moving tectonic plates, and that's a big difference compared to Earth. Here on Earth, moving tectonic plates are a major geological element, just crucial for the whole surface dynamic, right?（问题很大，听的时候没有迅速整合出几点不同，很零碎）但是意思就一个意思段意：金星和地球火山的区别：类型；分布；成因

So why doesn't Venus have them? Well, there are a few theories. One of them is that this has to do with the fact that Venus has no surface water that's needed to kind of lubricate the movement of the plates, you know, like oceans on Earth. Yeah, I forgot to spell tha t out. Uh, Venus

has no surface water.

段意：金星为何没有其它类型火山

Student: Wait a second. Did you say we have shield volcanoes on Earth? Can you give an example?

Professor: Sure. The volcanoes in the Hawaii islands, in the Pacific Ocean are shield volcanoes. They are formed over a hot spot of magma. So while on Earth we have several types of volcanoes, on Venus there's mostly the one type. Uh, Eric?

段意：瞎扯地球也有盾状火山

Student: Are the volcanoes on Venus still active?

Professor: Well, that's an interesting question. There is still some discussion on that point. But here's what we do know. First, the level of sulfur dioxide gas above Venus's clouds shows large and very frequent fluctuations. It is quite possible that these fluctuations, the huge increase and decrease of sulfur dioxide, happening again and again. It's quite possible that this is due to volcanic eruptions, because volcanic eruptions often emit gases. If that's the case, volcanism could very well be the root cause of Venus's thick cloud cover. （火山喷发导致气体变多变少，表述零碎复杂，听到断断续续没联起来）And also we have observed bursts of radio energy from the planet's surface. These bursts are similar to what we see when volcanoes erupt on Earth. So these two suggests ongoing volcanic activity. But although this is intriguing evidence, no one's actually observed a Venus volcano erupting yet,so we can't be positive.

段意：金星火山是否是活火山：两点证据最终不确定

问题总结：

1. 细节上：弱读问题很大，比如that在好几个定语从句里没听出来导致句子结构混乱，这也涉及到了听力长难句；连读也有问题，要复习好词霸营关于连读弱读的讲解，跟读对应句子之前分析好这些地方怎么连怎么弱；生词也影响了理解，比如两个技术的第一个。

2. 段落上：两段话问题特别大，本身表述有些复杂，地球金星区别那儿来回掰扯到只听得很乱，要理顺段内的关系，每句话没问题之后做整段跟读。

3. 选项上，理解不够准确，比如最后两点证据和最终不确定都听到但选项看的不仔细不够准确导致错题。